W±Z production at the LHC: fiducial cross sections and distributions in NNLO QCD

By M. Grazzini, Stefan Kallweit, D. Rathlev, M. Wiesemann. 2016

286 citations recorded by the source corpus.

A bstractWe report on the first fully differential calculation for W±Z production in hadron collisions up to next-to-next-to-leading order (NNLO) in QCD perturbation theory. Leptonic decays of the W and Z bosons are consistently taken into account, i.e. we include all resonant and non-resonant diagrams that contribute to the process pp → ℓ′±νℓ′ ℓ+ℓ− +X both in the same-flavour (ℓ′ = ℓ) and the different-flavour (ℓ′ ≠ ℓ) channel. Fiducial cross sections and distributions are presented in the presence of standard selection cuts applied in the experimental W±Z analyses by ATLAS and CMS at centre-of-mass energies of 8 and 13 TeV. As previously shown for the inclusive cross section, NNLO corrections increase the NNLO result by about 10%, thereby leading to an improved agreement with experimental data. The importance of NNLO accurate predictions is also shown in the case of new-physics scenarios, where, especially in high-pT categories, their impact can reach O20%$$ \mathcal{O}\left(20\%\right) $$. The availability of differential NNLO predictions will play a crucial role in the rich physics programme that is based on precision studies of W±Z signatures at the LHC.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/92bb511295cd3bbe666e26aff454be60478f9237

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Citations in the corpus

Measurements of properties of the Higgs boson decaying into the four-lepton final state in pp collisions at s=13$$ \sqrt{s}=13 $$ TeV (2017, methodology): “The NNLO K-factor for the signal is obtained as a function of mZZ using the HNNLO v2 program [40, 66, 67] by calculating the NNLO and LO gg → H → 2`2`′ cross sections at the small H boson decay width of 4.1 MeV and taking their ratios.”
Les Houches 2015: Physics at TeV Colliders Standard Model Working Group Report (2016, methodology): “V V ′, V ′γ: Complete N(2)LOQCD are now available for WW [165, 166], ZZ [167, 168], Zγ [169], Wγ [169] using the qT subtraction method.”
Fully differential NNLO computations with MATRIX (2017, background): “4 ppeeexex04 (pp/pp̄→ e−e−e+e+) Off-shell ZZ production [34] with Z-boson decays to same-flavour (SF) leptons31 includes the following predefined cuts:”
Next-to-leading-order electroweak corrections to the production of four charged leptons at the LHC (2016, background): “Recently, the next-to-next-to-leading order (NNLO) QCD corrections to Z-pair production have been calculated for the total cross section [27] and including leptonic decays [28].”
Les Houches 2017: Physics at TeV Colliders Standard Model Working Group Report (2017, methodology): “V V ′: Complete N(2)LOQCD are now available for all vector-boson pair production processes, namely WW [160,165], ZZ [161,164], WZ [163,166], Zγ [158,162], Wγ [162], using the qT subtraction method.”
W+W− production at the LHC: fiducial cross sections and distributions in NNLO QCD (2015, methodology): “[48, 61], for the calculations of Zγ [62,63], ZZ [64,65], W+W− [46], W±γ [63] and W±Z [66] production at NNLO QCD as well as in the resummed computations of the ZZ and W+W− transverse-momentum spectra [53] at NNLL+NNLO.”
Collider physics at the precision frontier (2020, unknown): “method processes (NNLO unless stated otherwise) antenna subtraction e+e− → 3 jets [950, 992–995], qq̄ → tt̄ [996], pp→ H+jet [140, 144, 156], pp→ jet+X [394, 997, 998], dijets [395, 999], pp→ Z+jet [1000, 1001], pp→ γ+jet [951, 1002, 1003], pp→ Z+b-jet [1004], DIS dijet [951], DIS jet+X [1005, 1002]”